caa a22 4500 44536999X CHVBK 20180317142943.0 cr unu---uuuuu 170323e20110901xx s 000 0 eng 10.1007/s00340-011-4407-5 doi (NATIONALLICENCE)springer-10.1007/s00340-011-4407-5 Upconversion excitations in Pr3+-doped BaY2F8 crystal [Elektronische Daten] [R. Piramidowicz, R. Mahiou, P. Boutinaud, M. Malinowski] We report the orange-to-blue and infrared-(IR)-to-blue wavelengths upconversion luminescence in Pr3+:BaY2F8 crystals. Mechanism of the orange light upconversion into blue 3P0 state emission was confirmed to be energy transfer between two Pr3+ ions in the 1D2 state. IR-to-blue upconversion has only been observed under two different color IR pumping. The first resonant step was the 3H4→1G4 ground state absorption transition, and the second resonant transition was the excited state absorption from the 1G4 to 1I6 and 3PJ levels. A comparison of the efficiency of the IR-to-blue upconversion in several praseodymium activated host is presented and discussed. A model of the IR pumped upconversion praseodymium blue laser is presented and the population inversion conditions are calculated. The Author(s), 2011 Piramidowicz R. Institute of Microelectronics and Optoelectronics PW, ul. Koszykowa 75, 00-662, Warsaw, Poland aut Mahiou R. Laboratoire des Matériaux Inorganiques, UMR-6002, Université Blaise Pascal and ENSCCF, 63-177, Aubiere Cedex, France aut Boutinaud P. Laboratoire des Matériaux Inorganiques, UMR-6002, Université Blaise Pascal and ENSCCF, 63-177, Aubiere Cedex, France aut Malinowski M. Institute of Microelectronics and Optoelectronics PW, ul. Koszykowa 75, 00-662, Warsaw, Poland aut Applied Physics B Springer-Verlag 104/4(2011-09-01), 873-881 0946-2171 104:4<873 2011 104 340 https://doi.org/10.1007/s00340-011-4407-5 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00340-011-4407-5 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Piramidowicz R. Institute of Microelectronics and Optoelectronics PW, ul. Koszykowa 75, 00-662, Warsaw, Poland aut NATIONALLICENCE 700 1- Mahiou R. Laboratoire des Matériaux Inorganiques, UMR-6002, Université Blaise Pascal and ENSCCF, 63-177, Aubiere Cedex, France aut NATIONALLICENCE 700 1- Boutinaud P. Laboratoire des Matériaux Inorganiques, UMR-6002, Université Blaise Pascal and ENSCCF, 63-177, Aubiere Cedex, France aut NATIONALLICENCE 700 1- Malinowski M. Institute of Microelectronics and Optoelectronics PW, ul. Koszykowa 75, 00-662, Warsaw, Poland aut NATIONALLICENCE 773 0- Applied Physics B Springer-Verlag 104/4(2011-09-01), 873-881 0946-2171 104:4<873 2011 104 340 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer